Malicious PDF — malware analysis report

Static analysis result for SHA-256 8092b5b97087c3fb…

MALICIOUS

PDF

84.2 KB Created: 2021-09-05 11:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 04de9f12236b3c33f9d2bfd83516148c SHA-1: 299a3117b1be18f62ca3916e8e30ff440cac0645 SHA-256: 8092b5b97087c3fb87fe79beaee22c9366bb77ccccbb12f6b9d9242898bf59ab
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple PDF_URI heuristics and the ML_NYX_PDF_MALICIOUS firing confirm the file's nature as a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://caratow.eu/userfiles/file/difamukorezuwapeg.pdf In PDF document text
    • https://uudanbury.life/files/file/gepopoberasize.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/96939837887.pdfPDF link annotation
    • http://opuspointpartners.com/ckfinder/userfiles/files/xufolaxigaviwofesofajita.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/robedazosaluwasadizavakul.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/gitedaxul.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/h0ha6k77as9bbiqenvnc3u6pn7/metosigugosomejatogewov.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7bf8db9e0961ad0e7dfb3c7db7c13b82/bupevirimizoti.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d30493cb602---44509268441.pdfIn PDF document text
    • http://billsky.ee/files/file/55274367223.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/60198241907.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756fa361f97---31636776020.pdfIn PDF document text
    • http://softtox.pl/new/userfiles/file/16049936701.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/mezebasefiduzin.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160966c7de188e---26125224815.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cf9fe231f---20054529226.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1e0a4b0cb9999fa1d3f4aaf546ca2f36/zazax.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/45984856308.pdfIn PDF document text
    • https://langumeistras.lt/i/File/kixuxetiwagogosotisijoke.pdfIn PDF document text
    • http://mamitobe.ru/files/file/22240025413.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/eij7jamf80daerolgsuhpvpa5d/479105453.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21f50dd45f---25134203107.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/13816421145.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16085a8927c6de---buwetofineliju.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/difegisulamilifuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=chemical+elements+in+the+human+body+worksheetPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE257 17904 bytes
SHA-256: a31c4e983e472fa1a4abb09a5ee6b60e38c59fe24244a01207033f91f273f2a3
font_01_sfnt_off00011098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11098 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AF 11196 bytes
SHA-256: bce26b2c18b094fe4b4734ab21d14eb944f22ff24187a019c50307536a3c939e

Open this report in the interactive analyzer, or submit your own file for analysis.